News and Views
Nature Geoscience 1, 218 - 219 (2008)
doi:10.1038/ngeo167
Subject Category: Palaeoclimate and palaeoceanography
Palaeoclimate: Tree rings floating on ice cores
Paula J. Reimer1 & Konrad A. Hughen2
- The 14CHRONO Centre for Climate, the Environment & Chronology, School of Geography, Archaeology and Palaeoecology, Queen's University Belfast, Belfast, BT7 1NN, UK.
-
Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, Massachusetts 02543 USA.
e-mail: p.j.reimer@qub.ac.uk
Abstract
Because of difficulties in creating a radiocarbon calibration that covers the end of the last glaciation, defining the timing and duration of the Younger Dryas cold event has been a challenge. Linking related cosmogenic isotopes in tree rings and ice cores may provide new insights into abrupt climate changes.
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Attaching a ?floating? tree-ring chronology to ice core records that cover the abrupt Younger Dryas cold interval during the last glacial termination provides a better estimate of the onset and duration of the radiocarbon anomaly. The chronology suggests that marine records may be biased by changes in the concentration of radiocarbon in the ocean, which may affect the accuracy of a popular radiocarbon calibration program during this interval. Attaching a ?floating? tree-ring chronology to ice?core records that cover the abrupt Younger Dryas cold interval during the last glacial termination provides a better estimate of the onset and duration of the radiocarbon anomaly. The chronology suggests that marine records may be biased by changes in the concentration of radiocarbon in the ocean, which may affect the accuracy of a popular radiocarbon calibration program during this interval.Nature Geoscience Article (01 Apr 2008)
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